Alert archive / North Carolina / Mesoscale Discussions in 2004

Mesoscale Discussion 1731

July 19, 200421 counties in North Carolina; 14 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Jul 19, 2004, 2:01 PM EDT for 21 counties in North Carolina; 14 counties in South Carolina. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 19, 2004, 2:01 PM EDT (18:01 UTC)
Expired: Jul 19, 2004, 4:30 PM EDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 35 counties

Beaufort County, NC, Bladen County, NC, Columbus County, NC, Cumberland County, NC, Duplin County, NC, Edgecombe County, NC, Greene County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Jones County, NC, Lenoir County, NC, Martin County, NC, Nash County, NC, Pender County, NC, Pitt County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Wayne County, NC, Wilson County, NC, Calhoun County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Florence County, SC, Horry County, SC, Lee County, SC, Marion County, SC, Marlboro County, SC, Orangeburg County, SC, Sumter County, SC, Williamsburg County, SC

The radar

The Wilmington radar (KLTX), 89 km from the middle of the area, began a volume at 18:04 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 6.0 hours before the alert went out and 189 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1303 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 575 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: -7 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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Nearby

Mesoscale Discussions in North Carolina, 2004 Mesoscale Discussions in South Carolina, 2004 Every mesoscale discussion in 2004

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.